willcox



(No Model.)

0. H, WILLGOX.

FEED MECHANISM FOR SEWING MACHINES.

No. 398,300. Patented Feb. 19, 1889.

FIG H FILGJII ("HARLES ll. \VILLCOX, OF NEIV YORK, N. Y., ASSIGNOR TOTHE WILLCOX & GIBBS SEW'ING MACHINE COMPANY, OF SAME PLACE.

FEED MECHANISM FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 398,300, dated February19, 1889.

Application filed November 20, 1888. Serial No. 291,335. (No model.)

.To aZZ whom it may concern: part of this specification, Figure I is apartial Be it known that I, CHARLES H. \VILLCOX, plan view of the partsunder the cloth-plate of New York city, in the county and State of ofthe machine; Fig. II, a side elevation, and New York, har e invented anew and useful Fig. III a rear View, of the feed-bar and shoe.

Improvement in Feed Mechanism for Sewing- The machine partiallyillustrated in these 5 5 Machines, which improvement is fully setdrawings is the well-known l/VillcoX (St Gibbs forth in the followingspecification. single-thread chain-stitch machine, and the Thisinvention has reference to feed mechfeed-mechanism illustrated issubstantially anism for sewing-machines, and its object is thatdescribed in patent of Villcox and Carlto prevent injury to themechanism in case of ton, No. 116,783, dated July 4:, 1871. 60accidental interference with the motion of the A is the main shaft, anda the feed-eccenfeed-bar, as by its catching the cloth or by trio, whichimparts the usual four motions to the winding up of the thread upon thelooper. the feed-bar B. Between the feed-bar B and In such case thedescent of the feed-bar by eccentric a is interposed the shoeC,surroundthe operation of the feed-eccentric is resisted, ing theeccentric and having a flat upper sur- 65 and if the resistance beconsiderable injury face, upon which the feed-bar-rests by gravity. tothe feed mechanism is likely to be caused The contact of these parts inthe normal workthereby. in g of the machine further insured by theAccording to the present invention the conpressure of the spring (1.Shoe O has a pronection between the feed-bar and feed-eccenj ection ortail-piece c, which extends between 70 trio, whereby the motion of thelatter is comthe overhanging part c and the projection f mnnicated tothe former, is of such a nature at the rear of the feed-bar, these partsformas in the ordinary operation of the machine ing between them arecess or slot. Contact to impart the proper motions to the feed, but ofthe projections c and f with the tail-piece 2 5 in case of suchaccident, as above specified, c prevents rotation of the shoe C witheccen- 75 to permit the feed-bar to remain at llS highest trio (1. Atits narrowest part the recessor point while the eccentric descends. Thisis slot is about the width of the tail-piece c: but effected by means ofa shoe, which surrounds this part is simply a line from which the rethefeed-eccentric and upon the uppersurface cess or slot is widened in bothdirections by of which the feed-bar rests by gravity in the cutting awaythe projections e and f at an 550 ordinary operation of the machine. Theangle, as best shown in Fig. III. The mann'essru'e of the spring, whichreturns the nor in which the part 1" is cut away forms an feed-bar, alsoaids in insuring the contact of edge g, upon which as a center the shoe(1 can those two parts. This shoe is provided with turn in case anythinoccurs to arrest the de- 3 5 a projection entering a recess in thefeed-bar, sccni of the feed-bar. The separation of the 8 5 and isthereby heldin position and prevented shoe (1 and feed-barB is shown. inFig. III. from rotation with the eccentric. The form It will readilybeseen that the construction of this recess is such that the shoe cansepadescribed permits the feed-eccentric to move rate from the feed-barsufficiently to descend to its lowest point without necessitating the 40with the eccentric should the feed-barby any descent of the feed-bar,and at the same time 90 accident he held in its highest position. Thecausing no damage to the parts.

recess, moreover, being in the rear of the feed- Modifications mayobviously be made in the bar, prevents the shoe slipping off theeccendetails of construction without departing from tric when thefeed-bar is in place. the spirit of the invention.

It is preferred to form the recess for receiv- I claim as my inventionor discovery 95 ing the projection of the shoe by cuttii'lg a 1. Thecombination, with the feed-bar and slot of proper form in the feedbar;but it feed-eccentric, of a shoe surrounding said eccould be formed bytapping a pin in the feedcentric and communicating motion therefrom barbelow the shoe. to said feed-bar, said. shoe having a tail-piece In theaccompanying drawings, which foim or extension resting upon aprojectionof said I09 feed-bar, upon which it can rocksufficiently walls on eachside of said contracted portion, to permit the descent of said eccentricand substantially as and for the purpose set forth. shoe, leaving saidfeed-bar in the highest po- In testimonywhereofIhave signed thisspecisition, substantially as described. fication in thepresence of twosubscribing wit- 5 2. The combination of the feed-bar, the feed- 5nesses.

eccentric, and the shoe interposed between 5 the two and havingatail-piece projecting into CHAS ILLCOX' a recess or slot in saidfeed-bar, said recess or \Vitnesses: slot having a contracted portionabout the i J. PARMLY, 10 Width of said tai1-piece,-and having divergentI E. A. RACE.

